---
type: restriction
id: usps-dyes-un2801-un3147
asset: shipping-restrictions-by-class
title: "Dyes (UN2801, UN3147) — Postal shipping restrictions by item category"
sources:
  - https://pe.usps.com/text/pub52/pub52c3_027.htm
source_quote: "Dyes (UN2801, UN3147): Acceptable if the dyes qualify as Limited Quantity air or Limited Quantity surface material"
generated: true
harvested: 2026-08-04
stale_after: 2027-08-04
item_category: "Dyes (UN2801, UN3147)"
carrier: "USPS"
restriction_type: "restricted"
scope: "domestic mail via air or surface transportation"
conditions: "Acceptable if dyes qualify as Limited Quantity air or surface; must follow Packaging Instruction 8A"
verified: true
unverified_fields: carrier, conditions, restriction_type
---
**Item category:** Dyes (UN2801, UN3147)

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail via air or surface transportation

**Conditions:** Acceptable if dyes qualify as Limited Quantity air or surface; must follow Packaging Instruction 8A

> Dyes (UN2801, UN3147): Acceptable if the dyes qualify as Limited Quantity air or Limited Quantity surface material

Source: <https://pe.usps.com/text/pub52/pub52c3_027.htm>